Diagnostic system



FIG. 1 is a perspective view of a diagnostic system showing our new design;

FIG. 2 is right side elevational view showing the design for the diagnostic system of FIG. 1;

FIG. 3 is a left side elevational view showing the design for the diagnostic system of FIG. 1;

FIG. 4 is a front elevational view showing the design for the diagnostic system of FIG. 1;

FIG. 5 is a rear elevational view showing the design for the diagnostic system of FIG. 1; and,

FIG. 6 is a top elevational view showing the design for the diagnostic system of FIG. 1. 

CLAIM The ornamental design for a diagnostic system, as shown and described. 